Tree-sawing machine



T. G. PERKINS. TREE SAWING MACHINEx HLED SEPT 21 1920 Jam., `9', w23,

ATTORNEY Jan. 9, 1923.

T. G. PEHKINS. TREE sAwiNG MACHJNE.

2 SHEETS-SHEET 2.

FILED SEPT. 21,1920.

INVENTOR mmf @Ww/412745 ATTORNEY ldateiited la-u. W23.,

tendrias e. rnianins, or snirrrnn-vvasniiieroit.

renie-sannio" iviacriiitn .aparaat-inlined separater ieee. semaine.litter To all whom ift/may conce/ra Be itlcnown that l, Trioiias (i.Pennine, a citizenot the United States,` residing `at deattle, lin thecounty otliing and @tate ot Washington. have invented certainnew anduseful lmprovements in "llree-idarviiig lilachinesyot which' thetolloiving" isa specifi l cation. i i

This invention relates to reciproca-tive lo .sawing machines tor tellingstandingL timber,

and has lor its objectto provideamachine pendingthe noaclrina` the same.While in oiE this character in which the reciprocatory V`movements oitthe saw are controlled to cause 'it to `operate inazmore rapid -andetlcctive it l manner than-"hitherto y.

llln other power recilirocatinpj` saws the saw blade is guided toproduce a substantially straight cut the entire `length ot thel kerl-.ln consequence of which sawdust collects in .to the kerl? to not onlyinteriore with the saiv i performing its'ivork butalso dulls the sawteeth. Besides the objectionsabove mentioned anlaccumiilationoisaivdu'st in a 'hert has a 'tendency to enter the interstices betweenthe all `vifalls oi the latter and the opposing surfaces "ofthe sawblade, resulting; in a considerable increaseof friction necessitating`the employvment ot arelatively large and :heavy saw and operatingmachine therefor. y au These and other difficulties are ydispensed`With-by my invention by reason ot the smv blade being actuated to cutin dil'lerent an a. i'ular directions in its successive-strokes.

L Thev invention consists in various.;featuresl ari-:details `andcombinations hereinafter de w scribed and claimed.v y iinthe-accompanying drawings, Figure l isla plan vienT oit a sawingmachine embodying my invention; Fig. 2 is aside elevation `fio of thesame; Fig. `3 a vertical longitudinal section taken on broken line otFig. l; Fig. Llis a View partlyi in rear elevationvand partly intransverse section, said i section being talren tl'irough a-e-i ofFig.3; it yllfig. 5" is a `front elevational vievv ott-he machine trame;Fig. die ari/underside `plan view of the sanrimpelling,` devices,"vvitha L portion of the `guiding means therefor which is" shown in horizontalsection; and llig. 7 5t! isa diagrammatic plan vien7 illustratingk themovements oi the saw *with respectto thel y Worin i 4 ill/ly improvedmachine-,basi a `traine, denoted; generally by1l0,' provided at its:iront ably of Wood.

`by the machine.

end with rigid hook eleinentsll engageable over a traclt rail12,1lll`igs. l and 2, which is secured to a horizontal supportl7 prei'er'lilso secured at a lower elevation to the lpiece 13 isa bai having rackteeth along 60 which is connected to said trame tor rela- 'tive verticalmovements.

lllhehooks il serve as `hangers tor" susoperation. being secured by thehoolr l5 ti'ombeing tilted upwardly.

`The 'hook is releasably held by avlever 16, fulcrumed at 'itil engagingupon a stop 17 70 provided on the trame as shown in Fig. 2. linpractice, the machine supportingpiece 13 itseli` is desirably'supportedupon 1a horiaon'talwledge as 18 provided by cutting a re cess in thetree which is to be operated upon @aid piece is rigidly held against thetree by dogs, such asQO, engag ing the saine at opposite sides.

VSide bar leleriients E21 oft the trame are connected at their rearendsby atransverse member provided With a slot 23 which serves asguideway li'or a tongue 2i provided at the rear' end ot'abeam 25 whichis swingable horizontally about a pivot pin 2G adj acent to the frontend ot the trame. A

As shown in Fig. 23? the pin 26 is in the nature oit a bolt'entendimiirthrough the trame member 27 and a platform member V2d srupported byiframe-elements 29 to be above o the beam Between its ends Vthe beaniQ9o is `formed with parallel channeledrail elen ments to atiord `,duideslots-)31 'tor ribs 32 `protrudingI laterally nfrom a plane sided gearc:` sing'` 33 ot a general elliptical form in horizontal section. lhiscasino; isopen from bee5 low and is formed interiorlyfwith a continnous`peripheral track for a rollen 3a.

i Said traclg comprising; .straight parallel side i portions ,Y `35 'andseinicircular end `portions 351 and Bltig. 6. "Within the chamber lollot said casing` is rack bar .36 having anend less series olfteetharranged parallel with said tracli and engaging the teeth eta pinion ,B7upon an upright power driven shalt 38 journaled in bearingsprovided inthe nialos chine trarne. 4lhe roller 34; acting against theatoredescribed track: serves to retain the pin `ion 37' in engagementwith the raclr whereby the pinion operates to impart to the gear casing33 endwise reciprocatory movements toward and from the pivotal pin 26 ofbeam 25 and also laterally with the beam.

39 represents a pin or bolt which extends upwardly from said gear casingand adjacent to its rear end where the maximum lateral movements obtain.This pin serves as a pivot for the rear end of an arm 40 whose forwardend is supported by a stud 4l thereof bearing upon the platform 28.

S represents a saw blade having its rear end seated upon the forwardportion of the arm 40 and fitting within slots of the arm lugs 42. Thesaw is bolted upon said arm by extending the screw threaded stem 411 ofsaid stud upwardly through an aperture of the saw to receive a nut 43above the latter.

Upon the top of platform 28 are strips 44 and 45 disposed insubstantially the angular relations with each other which is shown inFig. l and constitute guides for the stud 4l. whereby the saw strokesare regulated.

More particularly, said stud will bear against the guide strip 44 in allrearward strokes of the saw, indicated by direction arrow A Figs. 1 and7, until the beam 25 is swung by the aforesaid lrack-and-pinion gearingin the direction denoted by B. As said beam is swung away from thedirection of travel of the machine, see Fig. 7, the saw has a rearwardstroke and the stud 4l then bears against the guide strip 45.

Thus controlled by the devices above described, the cutting edge of thesaw will coincide approximately with broken lines F -F and R-R in Fig. 7in the successive forward and rearward strokes to accordingly provide akerf having a bottom, so to speak, which is angular instead ofstraight..

The shaft 38 which drives the saw may itself be driven by any suitablemeans. As illustrated in the drawings5 shaft 38 ir rotated by beveltoothed gears 47, 48 from a shaft 49 which, in turn, is driven by atrain of spur gears 50-51 from a crankshaft 52 rotated by a motor 53 ofsuitable type, pref* erably an explosion engine. The shaft 49. includedin the above described driving mechanism, has rigidlymounted thereon a.worm 54 (Figs. 3 and 4) which rotates a worm wheel 55 upon a stub shaft5G. The

vlatter' is in continuous connection by means of spurgears 57 and 57.1with the feed shaftv 58 which carries a toothed pinion 59 which engagesthe rack teeth of bar 14.

The worm wheel 55 is, however, releasably connected with its shaft 56 bysuitable clutching means although I prefer the construction illustratedin Fig. 3. In such pre` ferred form horns 60 provided on an end of theworm wheel act complementary to horns provided upon a clutch to theshaft and shifted into or out of* member 6l splined' couple with theworm wheel by means of a hand wheel 62 which is threaded upon thc shaft56.

llVhen the worm wheel is engaged to such shaft the feed or travel of themachine is effected by the saw driving mechanism.

When the worm wheel is disengaged inc machine may be manually shiftedupon the track through the instrumentality ot :i crank handle 63 torot-ate :i pinion 64 to drive the feed shaftI through the medium of thegear 57, shown in Fig. l-.

As illustrated in Figs. l` and 2, the machine is set to operate upon thetrack rail ele ment of a horizontal support 13 which is dogged to atree.

For operation, the saw i`I actuated to rc ciprocate in strokes havingdill'erent angu lar directions in the successive sawcuts which areeffective only toward the outside of a tree from a. vertical plane.ldenoted b v :n n F 7, parallel with the travel of the machine.

By reason of this characteristic the. saw kerf is kept clear of sawdust,thereby diminishing the extent of the wood which is cut in each strokeof the saw to less than one-half the diameter of a tree.

By such an arrangement, the. entire machine, including the saw, may beof relatively light weight in construction, the saw can be reciprocatedat a relatively high speed and with less power and expense than ispossible with any other sawing machines known to me. In sawing with mymachine into standing timber of large diameters, moreover, the saw teethcut directly into the wood instead of dragging a quantity of sawdustback and forth in the korf, thereby enabling the teeth to moreeffectively perform their function instead of comminuting sawdust intoparticles which act to dull the saw teeth,

That I claim, is,--

l. In a sawing machine, thc. combination with a frame, saw guidingdevices provided on said frame, a beam pivotally connected at one of-itsends to said frame for horizon tal swinging movements. a casing guidedfor longitudinal movements in said beam, un arm pivotally connected atone end to said casing, means provided at the other end of said arm andengaging said devices, a snw carried by said arm, an endless toothedrack provided in said casing and a ower driven pinion engaging said rackan( cooperating with said guiding devices to impart neeiprocating motionto the saw.

2. In a sawing machine, the machine frame having a platform memberprovided with saw guiding devices, a beam pivotcd at one end to theframe below said platform, a casing carried in said beam for relativelongitudinal motion, a saw, an arm secured to said saw, one end of saidarm being piv- (Wally aromeulwed t@ mid musing, mams; JG fggned at Samt@Wfashin pending 'fmm the @ber end 0f tlf mmv t0 b@ @ay of eptember,1920. supported upon th@ platform and eugaggw ,HUM/M. (.1 able with theguiding cevces threoif, and l JT' powa' rotated means Working Within.said casing to impart motion to Said :L1-m for l'ecplocatng th@ saw.

Wtnsms PIERRE lumlis. JAMES DOUD.

